Coal enterprise is belonged to a type traditional resource exploitation of enterprise. Coal mine security is very big influence to coal enterprise,and security work is very important station in coal mine production,and its management level is direct relative with existence and development of coal enterprise. Coal mine management task is very arduous because factors that are affect coal mine security are very complexity and contain a lots of uncertainty factors. The paper utilizes rough set to study selection of excavate coal mode,and chooses a mine working face of Jiaozuo mine bureau to process example analysis ,and the outcome makes clear that confirmation of excavate coal mode that is decided by rough set is compare objective,scientific and all-around ,and provides definite guarantee to ensure coal mine security。